MEHMET OZ

Andrew H. Walker / Getty

AGE: 47
OCCUPATION: Oprah regular, "America's Doctor" and professor of cardiac
surgery at Columbia
NUMBER OF TIME COVERS: 0
PREVIOUS APPEARANCES ON THE TIME 100: 0

PRO: The Oprah regular is a champion of yoga, a scourge of belly fat, and
half of a "What's Your Real Age?" brand (with Dr. Michael Roizen), which
extends over several television programs and books (such as the best seller
You: on a Diet).

CON: Maybe this whole "living longer" thing is overrated. But even if it
isn't, the DIY approach to health care propounded by celebrity doctors like
Oz might be distracting us from tough decisions we need to make about health care collectively.